Improved rstrip for copy.

src/fenrirscreenreader/commands/commands/copy_last_echo_to_clipboard.py

@@ -18,7 +18,9 @@ class command():
         return _('copies last presented text to the clipboard')    
     
     def run(self):
-        lastEcho = self.env['runtime']['outputManager'].getLastEcho().rstrip()
+        lastEcho = self.env['runtime']['outputManager'].getLastEcho()
+        if lastEcho.rstrip() != "":
+            lastEcho = lastEcho.rstrip()
         self.env['runtime']['memoryManager'].addValueToFirstIndex('clipboardHistory', lastEcho)
         self.env['runtime']['outputManager'].presentText(lastEcho, soundIcon='CopyToClipboard', interrupt=True)